mirror of
https://github.com/zeek/zeek.git
synced 2025-10-02 14:48:21 +00:00
Enable SMB by default by moving scripts from policy/ to base/
This commit is contained in:
Jon Siwek
parent
7fdf621a1d
commit
a04c76c035
33 changed files with 633 additions and 552 deletions
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Support for SMB protocol analysis.
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@load base/protocols/smb
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@load ./main
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@load ./smb1-main
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@load ./smb2-main
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@load ./files
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@load-sigs ./dpd.sig
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@ -1,5 +0,0 @@
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signature dpd_smb {
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ip-proto == tcp
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payload /^....[\xfe\xff]SMB/
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enable "smb"
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}
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@ -1,69 +0,0 @@
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@load base/frameworks/files
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@load ./main
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module SMB;
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export {
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## Default file handle provider for SMB.
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global get_file_handle: function(c: connection, is_orig: bool): string;
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## Default file describer for SMB.
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global describe_file: function(f: fa_file): string;
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}
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function get_file_handle(c: connection, is_orig: bool): string
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{
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if ( ! (c$smb_state?$current_file &&
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(c$smb_state$current_file?$name ||
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c$smb_state$current_file?$path)) )
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{
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# TODO - figure out what are the cases where this happens.
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return "";
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}
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local current_file = c$smb_state$current_file;
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local path_name = current_file?$path ? current_file$path : "";
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local file_name = current_file?$name ? current_file$name : "";
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# Include last_mod time if available because if a file has been modified it
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# should be considered a new file.
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local last_mod = cat(current_file?$times ? current_file$times$modified : double_to_time(0.0));
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# TODO: This is doing hexdump to avoid problems due to file analysis handling
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# using CheckString which is not immune to encapsulated null bytes.
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# This needs to be fixed lower in the file analysis code later.
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return hexdump(cat(Analyzer::ANALYZER_SMB, c$id$orig_h, c$id$resp_h, path_name, file_name, last_mod));
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}
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function describe_file(f: fa_file): string
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{
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# This shouldn't be needed, but just in case...
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if ( f$source != "SMB" )
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return "";
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for ( cid in f$conns )
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{
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local info = f$conns[cid];
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if ( info?$smb_state && info$smb_state?$current_file && info$smb_state$current_file?$name )
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return info$smb_state$current_file$name;
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}
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return "";
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}
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event bro_init() &priority=5
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{
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Files::register_protocol(Analyzer::ANALYZER_SMB,
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[$get_file_handle = SMB::get_file_handle,
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$describe = SMB::describe_file]);
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}
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event file_over_new_connection(f: fa_file, c: connection, is_orig: bool) &priority=5
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{
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if ( c?$smb_state && c$smb_state?$current_file )
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{
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c$smb_state$current_file$fuid = f$id;
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if ( c$smb_state$current_file$size > 0 )
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f$total_bytes = c$smb_state$current_file$size;
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if ( c$smb_state$current_file?$name )
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f$info$filename = c$smb_state$current_file$name;
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}
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}
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@ -1,268 +0,0 @@
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@load base/protocols/smb
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module SMB;
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export {
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redef enum Log::ID += {
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CMD_LOG,
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AUTH_LOG,
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MAPPING_LOG,
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FILES_LOG
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};
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## Abstracted actions for SMB file actions.
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type Action: enum {
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FILE_READ,
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FILE_WRITE,
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FILE_OPEN,
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FILE_CLOSE,
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FILE_DELETE,
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FILE_RENAME,
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FILE_SET_ATTRIBUTE,
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PIPE_READ,
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PIPE_WRITE,
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PIPE_OPEN,
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PIPE_CLOSE,
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PRINT_READ,
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PRINT_WRITE,
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PRINT_OPEN,
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PRINT_CLOSE,
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};
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## The file actions which are logged.
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const logged_file_actions: set[Action] = {
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FILE_OPEN,
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FILE_RENAME,
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FILE_DELETE,
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PRINT_OPEN,
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PRINT_CLOSE,
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} &redef;
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## The server response statuses which are *not* logged.
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const ignored_command_statuses: set[string] = {
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"MORE_PROCESSING_REQUIRED",
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} &redef;
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## This record is for the smb_files.log
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type FileInfo: record {
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## Time when the file was first discovered.
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ts : time &log;
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## Unique ID of the connection the file was sent over.
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uid : string &log;
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## ID of the connection the file was sent over.
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id : conn_id &log;
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## Unique ID of the file.
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fuid : string &log &optional;
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## Action this log record represents.
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action : Action &log &optional;
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## Path pulled from the tree this file was transferred to or from.
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path : string &log &optional;
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## Filename if one was seen.
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name : string &log &optional;
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## Total size of the file.
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size : count &log &default=0;
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## If the rename action was seen, this will be
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## the file's previous name.
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prev_name : string &log &optional;
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## Last time this file was modified.
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times : SMB::MACTimes &log &optional;
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};
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## This record is for the smb_mapping.log
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type TreeInfo: record {
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## Time when the tree was mapped.
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ts : time &log &optional;
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## Unique ID of the connection the tree was mapped over.
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uid : string &log;
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## ID of the connection the tree was mapped over.
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id : conn_id &log;
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## Name of the tree path.
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path : string &log &optional;
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## The type of resource of the tree (disk share, printer share, named pipe, etc.).
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service : string &log &optional;
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## File system of the tree.
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native_file_system : string &log &optional;
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## If this is SMB2, a share type will be included. For SMB1,
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## the type of share will be deduced and included as well.
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share_type : string &log &default="DISK";
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};
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## This record is for the smb_cmd.log
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type CmdInfo: record {
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## Timestamp of the command request.
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ts : time &log;
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## Unique ID of the connection the request was sent over.
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uid : string &log;
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## ID of the connection the request was sent over.
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id : conn_id &log;
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## The command sent by the client.
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command : string &log;
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## The subcommand sent by the client, if present.
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sub_command : string &log &optional;
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## Command argument sent by the client, if any.
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argument : string &log &optional;
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## Server reply to the client's command.
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status : string &log &optional;
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## Round trip time from the request to the response.
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rtt : interval &log &optional;
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## Version of SMB for the command.
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version : string &log;
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## Authenticated username, if available.
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username : string &log &optional;
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## If this is related to a tree, this is the tree
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## that was used for the current command.
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tree : string &log &optional;
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## The type of tree (disk share, printer share, named pipe, etc.).
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tree_service : string &log &optional;
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## If the command referenced a file, store it here.
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referenced_file : FileInfo &log &optional;
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## If the command referenced a tree, store it here.
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referenced_tree : TreeInfo &optional;
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};
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## This record stores the SMB state of in-flight commands,
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## the file and tree map of the connection.
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type State: record {
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## A reference to the current command.
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current_cmd : CmdInfo &optional;
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## A reference to the current file.
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current_file : FileInfo &optional;
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## A reference to the current tree.
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current_tree : TreeInfo &optional;
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## Indexed on MID to map responses to requests.
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pending_cmds : table[count] of CmdInfo &optional;
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## File map to retrieve file information based on the file ID.
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fid_map : table[count] of FileInfo &optional;
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## Tree map to retrieve tree information based on the tree ID.
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tid_map : table[count] of TreeInfo &optional;
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## User map to retrieve user name based on the user ID.
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uid_map : table[count] of string &optional;
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## Pipe map to retrieve UUID based on the file ID of a pipe.
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pipe_map : table[count] of string &optional;
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## A set of recent files to avoid logging the same
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## files over and over in the smb files log.
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## This only applies to files seen in a single connection.
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recent_files : set[string] &default=string_set() &read_expire=3min;
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};
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## Optionally write out the SMB commands log. This is
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## primarily useful for debugging so is disabled by default.
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const write_cmd_log = F &redef;
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## Everything below here is used internally in the SMB scripts.
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redef record connection += {
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smb_state : State &optional;
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};
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## Internal use only.
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## Some commands shouldn't be logged by the smb1_message event.
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const deferred_logging_cmds: set[string] = {
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"NEGOTIATE",
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"READ_ANDX",
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"SESSION_SETUP_ANDX",
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"TREE_CONNECT_ANDX",
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};
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## This is an internally used function.
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const set_current_file: function(smb_state: State, file_id: count) &redef;
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## This is an internally used function.
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const write_file_log: function(state: State) &redef;
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}
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redef record FileInfo += {
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## ID referencing this file.
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fid : count &optional;
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## UUID referencing this file if DCE/RPC.
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uuid : string &optional;
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};
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const ports = { 139/tcp, 445/tcp };
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redef likely_server_ports += { ports };
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event bro_init() &priority=5
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{
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Log::create_stream(SMB::CMD_LOG, [$columns=SMB::CmdInfo, $path="smb_cmd"]);
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Log::create_stream(SMB::FILES_LOG, [$columns=SMB::FileInfo, $path="smb_files"]);
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Log::create_stream(SMB::MAPPING_LOG, [$columns=SMB::TreeInfo, $path="smb_mapping"]);
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Analyzer::register_for_ports(Analyzer::ANALYZER_SMB, ports);
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}
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function set_current_file(smb_state: State, file_id: count)
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{
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if ( file_id !in smb_state$fid_map )
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{
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smb_state$fid_map[file_id] = smb_state$current_cmd$referenced_file;
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smb_state$fid_map[file_id]$fid = file_id;
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}
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smb_state$current_cmd$referenced_file = smb_state$fid_map[file_id];
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smb_state$current_file = smb_state$current_cmd$referenced_file;
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}
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function write_file_log(state: State)
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{
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local f = state$current_file;
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if ( f?$name &&
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f$action in logged_file_actions )
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{
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# Everything in this if statement is to avoid overlogging
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# of the same data from a single connection based on recently
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# seen files in the SMB::State $recent_files field.
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if ( f?$times )
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{
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local file_ident = cat(f$action,
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f?$fuid ? f$fuid : "",
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f?$name ? f$name : "",
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f?$path ? f$path : "",
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f$size,
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f$times);
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if ( file_ident in state$recent_files )
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{
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# We've already seen this file and don't want to log it again.
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return;
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}
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else
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add state$recent_files[file_ident];
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}
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Log::write(FILES_LOG, f);
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}
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}
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event smb_pipe_connect_heuristic(c: connection) &priority=5
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{
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c$smb_state$current_tree$path = "<unknown>";
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c$smb_state$current_tree$share_type = "PIPE";
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}
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event file_state_remove(f: fa_file) &priority=-5
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{
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if ( f$source != "SMB" )
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return;
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for ( id in f$conns )
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{
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local c = f$conns[id];
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if ( c?$smb_state && c$smb_state?$current_file)
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{
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write_file_log(c$smb_state);
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}
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return;
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}
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}
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@ -1,342 +0,0 @@
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@load ./main
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module SMB1;
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redef record SMB::CmdInfo += {
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## Dialects offered by the client.
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smb1_offered_dialects: string_vec &optional;
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};
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event smb1_message(c: connection, hdr: SMB1::Header, is_orig: bool) &priority=5
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{
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if ( ! c?$smb_state )
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{
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local state: SMB::State;
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state$fid_map = table();
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state$tid_map = table();
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state$uid_map = table();
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state$pipe_map = table();
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state$pending_cmds = table();
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c$smb_state = state;
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}
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local smb_state = c$smb_state;
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local tid = hdr$tid;
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local uid = hdr$uid;
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local pid = hdr$pid;
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local mid = hdr$mid;
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if ( uid in smb_state$uid_map )
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{
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smb_state$current_cmd$username = smb_state$uid_map[uid];
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}
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if ( tid !in smb_state$tid_map )
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{
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smb_state$tid_map[tid] = SMB::TreeInfo($uid=c$uid, $id=c$id);
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}
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smb_state$current_tree = smb_state$tid_map[tid];
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if ( smb_state$current_tree?$path )
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{
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smb_state$current_cmd$tree = smb_state$current_tree$path;
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}
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if ( smb_state$current_tree?$service )
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{
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smb_state$current_cmd$tree_service = smb_state$current_tree$service;
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}
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if ( mid !in smb_state$pending_cmds )
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{
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local tmp_cmd = SMB::CmdInfo($ts=network_time(), $uid=c$uid, $id=c$id, $version="SMB1", $command = SMB1::commands[hdr$command]);
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local tmp_file = SMB::FileInfo($ts=network_time(), $uid=c$uid, $id=c$id);
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tmp_cmd$referenced_file = tmp_file;
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tmp_cmd$referenced_tree = smb_state$current_tree;
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smb_state$pending_cmds[mid] = tmp_cmd;
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}
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smb_state$current_cmd = smb_state$pending_cmds[mid];
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if ( !is_orig )
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{
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smb_state$current_cmd$rtt = network_time() - smb_state$current_cmd$ts;
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smb_state$current_cmd$status = SMB::statuses[hdr$status]$id;
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}
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}
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event smb1_message(c: connection, hdr: SMB1::Header, is_orig: bool) &priority=-5
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{
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# Is this a response?
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if ( !is_orig )
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{
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if ( SMB::write_cmd_log &&
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c$smb_state$current_cmd$status !in SMB::ignored_command_statuses &&
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c$smb_state$current_cmd$command !in SMB::deferred_logging_cmds )
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{
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Log::write(SMB::CMD_LOG, c$smb_state$current_cmd);
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}
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delete c$smb_state$pending_cmds[hdr$mid];
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}
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}
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event smb1_transaction2_request(c: connection, hdr: SMB1::Header, args: SMB1::Trans2_Args, sub_cmd: count)
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{
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c$smb_state$current_cmd$sub_command = SMB1::trans2_sub_commands[sub_cmd];
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}
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event smb1_negotiate_request(c: connection, hdr: SMB1::Header, dialects: string_vec) &priority=5
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{
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c$smb_state$current_cmd$smb1_offered_dialects = dialects;
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}
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event smb1_negotiate_response(c: connection, hdr: SMB1::Header, response: SMB1::NegotiateResponse) &priority=5
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{
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if ( c$smb_state$current_cmd?$smb1_offered_dialects )
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{
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if ( response?$ntlm )
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{
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c$smb_state$current_cmd$argument = c$smb_state$current_cmd$smb1_offered_dialects[response$ntlm$dialect_index];
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}
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delete c$smb_state$current_cmd$smb1_offered_dialects;
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}
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}
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event smb1_negotiate_response(c: connection, hdr: SMB1::Header, response: SMB1::NegotiateResponse) &priority=-5
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{
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}
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event smb1_tree_connect_andx_request(c: connection, hdr: SMB1::Header, path: string, service: string) &priority=5
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{
|
||||
local tmp_tree = SMB::TreeInfo($ts=network_time(), $uid=c$uid, $id=c$id, $path=path, $service=service);
|
||||
|
||||
c$smb_state$current_cmd$referenced_tree = tmp_tree;
|
||||
c$smb_state$current_cmd$argument = path;
|
||||
}
|
||||
|
||||
event smb1_tree_connect_andx_response(c: connection, hdr: SMB1::Header, service: string, native_file_system: string) &priority=5
|
||||
{
|
||||
c$smb_state$current_cmd$referenced_tree$service = service;
|
||||
if ( service == "IPC" )
|
||||
c$smb_state$current_cmd$referenced_tree$share_type = "PIPE";
|
||||
|
||||
c$smb_state$current_cmd$tree_service = service;
|
||||
|
||||
if ( native_file_system != "" )
|
||||
c$smb_state$current_cmd$referenced_tree$native_file_system = native_file_system;
|
||||
|
||||
c$smb_state$current_tree = c$smb_state$current_cmd$referenced_tree;
|
||||
c$smb_state$tid_map[hdr$tid] = c$smb_state$current_tree;
|
||||
}
|
||||
|
||||
event smb1_tree_connect_andx_response(c: connection, hdr: SMB1::Header, service: string, native_file_system: string) &priority=-5
|
||||
{
|
||||
Log::write(SMB::MAPPING_LOG, c$smb_state$current_tree);
|
||||
}
|
||||
|
||||
event smb1_nt_create_andx_request(c: connection, hdr: SMB1::Header, name: string) &priority=5
|
||||
{
|
||||
local tmp_file = SMB::FileInfo($ts=network_time(), $uid=c$uid, $id=c$id);
|
||||
c$smb_state$current_cmd$referenced_file = tmp_file;
|
||||
|
||||
c$smb_state$current_cmd$referenced_file$name = name;
|
||||
c$smb_state$current_cmd$referenced_file$action = SMB::FILE_OPEN;
|
||||
c$smb_state$current_file = c$smb_state$current_cmd$referenced_file;
|
||||
c$smb_state$current_cmd$argument = name;
|
||||
}
|
||||
|
||||
event smb1_nt_create_andx_response(c: connection, hdr: SMB1::Header, file_id: count, file_size: count, times: SMB::MACTimes) &priority=5
|
||||
{
|
||||
c$smb_state$current_cmd$referenced_file$action = SMB::FILE_OPEN;
|
||||
c$smb_state$current_cmd$referenced_file$fid = file_id;
|
||||
c$smb_state$current_cmd$referenced_file$size = file_size;
|
||||
|
||||
# I'm seeing negative data from IPC tree transfers
|
||||
if ( time_to_double(times$modified) > 0.0 )
|
||||
c$smb_state$current_cmd$referenced_file$times = times;
|
||||
|
||||
# We can identify the file by its file id now so let's stick it
|
||||
# in the file map.
|
||||
c$smb_state$fid_map[file_id] = c$smb_state$current_cmd$referenced_file;
|
||||
|
||||
c$smb_state$current_file = c$smb_state$fid_map[file_id];
|
||||
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb1_read_andx_request(c: connection, hdr: SMB1::Header, file_id: count, offset: count, length: count) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id);
|
||||
c$smb_state$current_file$action = SMB::FILE_READ;
|
||||
if ( c$smb_state$current_file?$name )
|
||||
c$smb_state$current_cmd$argument = c$smb_state$current_file$name;
|
||||
}
|
||||
|
||||
event smb1_read_andx_request(c: connection, hdr: SMB1::Header, file_id: count, offset: count, length: count) &priority=-5
|
||||
{
|
||||
if ( c$smb_state$current_tree?$path && !c$smb_state$current_file?$path )
|
||||
c$smb_state$current_file$path = c$smb_state$current_tree$path;
|
||||
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb1_write_andx_request(c: connection, hdr: SMB1::Header, file_id: count, offset: count, data_len: count) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id);
|
||||
c$smb_state$current_file$action = SMB::FILE_WRITE;
|
||||
if ( !c$smb_state$current_cmd?$argument &&
|
||||
# TODO: figure out why name isn't getting set sometimes.
|
||||
c$smb_state$current_file?$name )
|
||||
c$smb_state$current_cmd$argument = c$smb_state$current_file$name;
|
||||
}
|
||||
|
||||
event smb1_write_andx_request(c: connection, hdr: SMB1::Header, file_id: count, offset: count, data_len: count) &priority=-5
|
||||
{
|
||||
if ( c$smb_state$current_tree?$path && !c$smb_state$current_file?$path )
|
||||
c$smb_state$current_file$path = c$smb_state$current_tree$path;
|
||||
|
||||
# We don't even try to log reads and writes to the files log.
|
||||
#write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
#event smb1_write_andx_response(c: connection, hdr: SMB1::Header, written_bytes: count) &priority=5
|
||||
# {
|
||||
# # TODO - determine what to do here
|
||||
# }
|
||||
|
||||
event smb1_close_request(c: connection, hdr: SMB1::Header, file_id: count) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id);
|
||||
c$smb_state$current_file$action = SMB::FILE_CLOSE;
|
||||
}
|
||||
|
||||
event smb1_close_request(c: connection, hdr: SMB1::Header, file_id: count) &priority=-5
|
||||
{
|
||||
if ( file_id in c$smb_state$fid_map )
|
||||
{
|
||||
local fl = c$smb_state$fid_map[file_id];
|
||||
# Need to check for existence of path in case tree connect message wasn't seen.
|
||||
if ( c$smb_state$current_tree?$path )
|
||||
fl$path = c$smb_state$current_tree$path;
|
||||
|
||||
if ( fl?$name )
|
||||
c$smb_state$current_cmd$argument = fl$name;
|
||||
|
||||
delete c$smb_state$fid_map[file_id];
|
||||
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
else
|
||||
{
|
||||
# TODO - Determine correct action
|
||||
# A reporter message is not right...
|
||||
#Reporter::warning("attempting to close an unknown file!");
|
||||
}
|
||||
}
|
||||
|
||||
event smb1_trans2_get_dfs_referral_request(c: connection, hdr: SMB1::Header, file_name: string)
|
||||
{
|
||||
c$smb_state$current_cmd$argument = file_name;
|
||||
}
|
||||
|
||||
event smb1_trans2_query_path_info_request(c: connection, hdr: SMB1::Header, file_name: string)
|
||||
{
|
||||
c$smb_state$current_cmd$argument = file_name;
|
||||
}
|
||||
|
||||
event smb1_trans2_find_first2_request(c: connection, hdr: SMB1::Header, args: SMB1::Find_First2_Request_Args)
|
||||
{
|
||||
c$smb_state$current_cmd$argument = args$file_name;
|
||||
}
|
||||
|
||||
event smb1_session_setup_andx_request(c: connection, hdr: SMB1::Header, request: SMB1::SessionSetupAndXRequest) &priority=5
|
||||
{
|
||||
# No behavior yet.
|
||||
}
|
||||
|
||||
event smb1_session_setup_andx_response(c: connection, hdr: SMB1::Header, response: SMB1::SessionSetupAndXResponse) &priority=-5
|
||||
{
|
||||
# No behavior yet.
|
||||
}
|
||||
|
||||
event smb1_transaction_request(c: connection, hdr: SMB1::Header, name: string, sub_cmd: count, parameters: string, data: string)
|
||||
{
|
||||
c$smb_state$current_cmd$sub_command = SMB1::trans_sub_commands[sub_cmd];
|
||||
}
|
||||
|
||||
event smb1_write_andx_request(c: connection, hdr: SMB1::Header, file_id: count, offset: count, data_len: count)
|
||||
{
|
||||
if ( ! c$smb_state?$current_file || ! c$smb_state$current_file?$uuid )
|
||||
{
|
||||
# TODO: figure out why the uuid isn't getting set sometimes.
|
||||
return;
|
||||
}
|
||||
|
||||
c$smb_state$pipe_map[file_id] = c$smb_state$current_file$uuid;
|
||||
}
|
||||
|
||||
event smb_pipe_bind_ack_response(c: connection, hdr: SMB1::Header)
|
||||
{
|
||||
if ( ! c$smb_state?$current_file || ! c$smb_state$current_file?$uuid )
|
||||
{
|
||||
# TODO: figure out why the uuid isn't getting set sometimes.
|
||||
return;
|
||||
}
|
||||
|
||||
c$smb_state$current_cmd$sub_command = "RPC_BIND_ACK";
|
||||
c$smb_state$current_cmd$argument = SMB::rpc_uuids[c$smb_state$current_file$uuid];
|
||||
}
|
||||
|
||||
event smb_pipe_bind_request(c: connection, hdr: SMB1::Header, uuid: string, version: string)
|
||||
{
|
||||
if ( ! c$smb_state?$current_file || ! c$smb_state$current_file?$uuid )
|
||||
{
|
||||
# TODO: figure out why the current_file isn't getting set sometimes.
|
||||
return;
|
||||
}
|
||||
|
||||
c$smb_state$current_cmd$sub_command = "RPC_BIND";
|
||||
c$smb_state$current_file$uuid = uuid;
|
||||
c$smb_state$current_cmd$argument = fmt("%s v%s", SMB::rpc_uuids[uuid], version);
|
||||
}
|
||||
|
||||
event smb_pipe_request(c: connection, hdr: SMB1::Header, op_num: count)
|
||||
{
|
||||
if ( ! c$smb_state?$current_file )
|
||||
{
|
||||
# TODO: figure out why the current file isn't being set sometimes.
|
||||
return;
|
||||
}
|
||||
|
||||
local f = c$smb_state$current_file;
|
||||
if ( ! f?$uuid )
|
||||
{
|
||||
# TODO: figure out why this is happening.
|
||||
event conn_weird("smb_pipe_request_missing_uuid", c, "");
|
||||
return;
|
||||
}
|
||||
local arg = fmt("%s: %s",
|
||||
SMB::rpc_uuids[f$uuid],
|
||||
SMB::rpc_sub_cmds[f$uuid][op_num]);
|
||||
|
||||
c$smb_state$current_cmd$argument = arg;
|
||||
}
|
||||
|
||||
event smb1_error(c: connection, hdr: SMB1::Header, is_orig: bool)
|
||||
{
|
||||
if ( ! is_orig )
|
||||
{
|
||||
# This is for deferred commands only.
|
||||
# The more specific messages won't fire for errors
|
||||
if ( SMB::write_cmd_log &&
|
||||
c$smb_state$current_cmd$status !in SMB::ignored_command_statuses &&
|
||||
c$smb_state$current_cmd$command in SMB::deferred_logging_cmds )
|
||||
{
|
||||
Log::write(SMB::CMD_LOG, c$smb_state$current_cmd);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -1,353 +0,0 @@
|
|||
@load ./main
|
||||
|
||||
module SMB2;
|
||||
|
||||
redef record SMB::CmdInfo += {
|
||||
## Dialects offered by the client.
|
||||
smb2_offered_dialects: index_vec &optional;
|
||||
};
|
||||
|
||||
event smb2_message(c: connection, hdr: SMB2::Header, is_orig: bool) &priority=5
|
||||
{
|
||||
if ( ! c?$smb_state )
|
||||
{
|
||||
local state: SMB::State;
|
||||
state$fid_map = table();
|
||||
state$tid_map = table();
|
||||
state$uid_map = table();
|
||||
state$pending_cmds = table();
|
||||
state$pipe_map = table();
|
||||
c$smb_state = state;
|
||||
}
|
||||
|
||||
local smb_state = c$smb_state;
|
||||
local tid = hdr$tree_id;
|
||||
local pid = hdr$process_id;
|
||||
local mid = hdr$message_id;
|
||||
local sid = hdr$session_id;
|
||||
|
||||
if ( mid !in smb_state$pending_cmds )
|
||||
{
|
||||
local tmp_file = SMB::FileInfo($ts=network_time(), $uid=c$uid, $id=c$id);
|
||||
local tmp_cmd = SMB::CmdInfo($ts=network_time(), $uid=c$uid, $id=c$id, $version="SMB2", $command = SMB2::commands[hdr$command]);
|
||||
tmp_cmd$referenced_file = tmp_file;
|
||||
smb_state$pending_cmds[mid] = tmp_cmd;
|
||||
}
|
||||
smb_state$current_cmd = smb_state$pending_cmds[mid];
|
||||
|
||||
if ( tid > 0 )
|
||||
{
|
||||
if ( smb_state$current_cmd?$referenced_tree )
|
||||
{
|
||||
smb_state$tid_map[tid] = smb_state$current_cmd$referenced_tree;
|
||||
}
|
||||
else if ( tid !in smb_state$tid_map )
|
||||
{
|
||||
local tmp_tree = SMB::TreeInfo($ts=network_time(), $uid=c$uid, $id=c$id);
|
||||
smb_state$tid_map[tid] = tmp_tree;
|
||||
}
|
||||
smb_state$current_cmd$referenced_tree = smb_state$tid_map[tid];
|
||||
}
|
||||
else
|
||||
{
|
||||
smb_state$current_cmd$referenced_tree = SMB::TreeInfo($ts=network_time(), $uid=c$uid, $id=c$id);
|
||||
}
|
||||
|
||||
smb_state$current_file = smb_state$current_cmd$referenced_file;
|
||||
smb_state$current_tree = smb_state$current_cmd$referenced_tree;
|
||||
|
||||
if ( !is_orig )
|
||||
{
|
||||
smb_state$current_cmd$rtt = network_time() - smb_state$current_cmd$ts;
|
||||
smb_state$current_cmd$status = SMB::statuses[hdr$status]$id;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_message(c: connection, hdr: SMB2::Header, is_orig: bool) &priority=-5
|
||||
{
|
||||
# Is this a response?
|
||||
if ( !is_orig )
|
||||
{
|
||||
# If the command that is being looked at right now was
|
||||
# marked as PENDING, then we'll skip all of this and wait
|
||||
# for a reply that isn't marked pending.
|
||||
if ( c$smb_state$current_cmd$status == "PENDING" )
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
if ( SMB::write_cmd_log &&
|
||||
c$smb_state$current_cmd$status !in SMB::ignored_command_statuses &&
|
||||
c$smb_state$current_cmd$command !in SMB::deferred_logging_cmds )
|
||||
{
|
||||
Log::write(SMB::CMD_LOG, c$smb_state$current_cmd);
|
||||
}
|
||||
delete c$smb_state$pending_cmds[hdr$message_id];
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_negotiate_request(c: connection, hdr: SMB2::Header, dialects: index_vec) &priority=5
|
||||
{
|
||||
c$smb_state$current_cmd$smb2_offered_dialects = dialects;
|
||||
}
|
||||
|
||||
event smb2_negotiate_response(c: connection, hdr: SMB2::Header, response: SMB2::NegotiateResponse) &priority=5
|
||||
{
|
||||
if ( c$smb_state$current_cmd?$smb2_offered_dialects )
|
||||
{
|
||||
for ( i in c$smb_state$current_cmd$smb2_offered_dialects )
|
||||
{
|
||||
if ( response$dialect_revision == c$smb_state$current_cmd$smb2_offered_dialects[i] )
|
||||
{
|
||||
c$smb_state$current_cmd$argument = SMB2::dialects[response$dialect_revision];
|
||||
break;
|
||||
}
|
||||
}
|
||||
delete c$smb_state$current_cmd$smb2_offered_dialects;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_negotiate_response(c: connection, hdr: SMB2::Header, response: SMB2::NegotiateResponse) &priority=5
|
||||
{
|
||||
# No behavior yet.
|
||||
}
|
||||
|
||||
event smb2_tree_connect_request(c: connection, hdr: SMB2::Header, path: string) &priority=5
|
||||
{
|
||||
c$smb_state$current_tree$path = path;
|
||||
}
|
||||
|
||||
event smb2_tree_connect_response(c: connection, hdr: SMB2::Header, response: SMB2::TreeConnectResponse) &priority=5
|
||||
{
|
||||
c$smb_state$current_tree$share_type = SMB2::share_types[response$share_type];
|
||||
}
|
||||
|
||||
event smb2_tree_connect_response(c: connection, hdr: SMB2::Header, response: SMB2::TreeConnectResponse) &priority=-5
|
||||
{
|
||||
Log::write(SMB::MAPPING_LOG, c$smb_state$current_tree);
|
||||
}
|
||||
|
||||
event smb2_tree_disconnect_request(c: connection, hdr: SMB2::Header) &priority=5
|
||||
{
|
||||
if ( hdr$tree_id in c$smb_state$tid_map )
|
||||
{
|
||||
delete c$smb_state$tid_map[hdr$tree_id];
|
||||
delete c$smb_state$current_tree;
|
||||
delete c$smb_state$current_cmd$referenced_tree;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_create_request(c: connection, hdr: SMB2::Header, request: SMB2::CreateRequest) &priority=5
|
||||
{
|
||||
if ( request$filename == "")
|
||||
request$filename = "<share_root>";
|
||||
|
||||
c$smb_state$current_file$name = request$filename;
|
||||
|
||||
switch ( c$smb_state$current_tree$share_type )
|
||||
{
|
||||
case "DISK":
|
||||
c$smb_state$current_file$action = SMB::FILE_OPEN;
|
||||
break;
|
||||
case "PIPE":
|
||||
c$smb_state$current_file$action = SMB::PIPE_OPEN;
|
||||
break;
|
||||
case "PRINT":
|
||||
c$smb_state$current_file$action = SMB::PRINT_OPEN;
|
||||
break;
|
||||
default:
|
||||
c$smb_state$current_file$action = SMB::FILE_OPEN;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_create_response(c: connection, hdr: SMB2::Header, response: SMB2::CreateResponse) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, response$file_id$persistent+response$file_id$volatile);
|
||||
|
||||
c$smb_state$current_file$fid = response$file_id$persistent+response$file_id$volatile;
|
||||
c$smb_state$current_file$size = response$size;
|
||||
|
||||
if ( c$smb_state$current_tree?$path )
|
||||
c$smb_state$current_file$path = c$smb_state$current_tree$path;
|
||||
|
||||
# I'm seeing negative data from IPC tree transfers
|
||||
if ( time_to_double(response$times$modified) > 0.0 )
|
||||
c$smb_state$current_file$times = response$times;
|
||||
|
||||
# We can identify the file by its file id now so let's stick it
|
||||
# in the file map.
|
||||
c$smb_state$fid_map[response$file_id$persistent+response$file_id$volatile] = c$smb_state$current_file;
|
||||
|
||||
c$smb_state$current_file = c$smb_state$fid_map[response$file_id$persistent+response$file_id$volatile];
|
||||
}
|
||||
|
||||
event smb2_create_response(c: connection, hdr: SMB2::Header, response: SMB2::CreateResponse) &priority=-5
|
||||
{
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb2_read_request(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, offset: count, length: count) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id$persistent+file_id$volatile);
|
||||
|
||||
switch ( c$smb_state$current_tree$share_type )
|
||||
{
|
||||
case "DISK":
|
||||
c$smb_state$current_file$action = SMB::FILE_READ;
|
||||
break;
|
||||
case "PIPE":
|
||||
c$smb_state$current_file$action = SMB::PIPE_READ;
|
||||
break;
|
||||
case "PRINT":
|
||||
c$smb_state$current_file$action = SMB::PRINT_READ;
|
||||
break;
|
||||
default:
|
||||
c$smb_state$current_file$action = SMB::FILE_READ;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_read_request(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, offset: count, length: count) &priority=-5
|
||||
{
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb2_write_request(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, offset: count, length: count) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id$persistent+file_id$volatile);
|
||||
|
||||
switch ( c$smb_state$current_tree$share_type )
|
||||
{
|
||||
case "DISK":
|
||||
c$smb_state$current_file$action = SMB::FILE_WRITE;
|
||||
break;
|
||||
case "PIPE":
|
||||
c$smb_state$current_file$action = SMB::PIPE_WRITE;
|
||||
break;
|
||||
case "PRINT":
|
||||
c$smb_state$current_file$action = SMB::PRINT_WRITE;
|
||||
break;
|
||||
default:
|
||||
c$smb_state$current_file$action = SMB::FILE_WRITE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_write_request(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, offset: count, length: count) &priority=-5
|
||||
{
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb2_file_sattr(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, times: SMB::MACTimes, attrs: SMB2::FileAttrs) &priority=-5
|
||||
{
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb2_file_sattr(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, times: SMB::MACTimes, attrs: SMB2::FileAttrs) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id$persistent+file_id$volatile);
|
||||
|
||||
switch ( c$smb_state$current_tree$share_type )
|
||||
{
|
||||
case "DISK":
|
||||
c$smb_state$current_file$action = SMB::FILE_SET_ATTRIBUTE;
|
||||
break;
|
||||
default:
|
||||
c$smb_state$current_file$action = SMB::FILE_SET_ATTRIBUTE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_file_rename(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, dst_filename: string) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id$persistent+file_id$volatile);
|
||||
|
||||
if ( c$smb_state$current_file?$name )
|
||||
c$smb_state$current_file$prev_name = c$smb_state$current_file$name;
|
||||
|
||||
c$smb_state$current_file$name = dst_filename;
|
||||
|
||||
switch ( c$smb_state$current_tree$share_type )
|
||||
{
|
||||
case "DISK":
|
||||
c$smb_state$current_file$action = SMB::FILE_RENAME;
|
||||
break;
|
||||
default:
|
||||
c$smb_state$current_file$action = SMB::FILE_RENAME;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_file_rename(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, dst_filename: string) &priority=-5
|
||||
{
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb2_file_delete(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, delete_pending: bool) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id$persistent+file_id$volatile);
|
||||
|
||||
if ( ! delete_pending )
|
||||
{
|
||||
# This is weird beause it would mean that someone didn't
|
||||
# set the delete bit in a delete request.
|
||||
return;
|
||||
}
|
||||
|
||||
switch ( c$smb_state$current_tree$share_type )
|
||||
{
|
||||
case "DISK":
|
||||
c$smb_state$current_file$action = SMB::FILE_DELETE;
|
||||
break;
|
||||
default:
|
||||
c$smb_state$current_file$action = SMB::FILE_DELETE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_file_delete(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID, delete_pending: bool) &priority=-5
|
||||
{
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
|
||||
event smb2_close_request(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID) &priority=5
|
||||
{
|
||||
SMB::set_current_file(c$smb_state, file_id$persistent+file_id$volatile);
|
||||
|
||||
switch ( c$smb_state$current_tree$share_type )
|
||||
{
|
||||
case "DISK":
|
||||
c$smb_state$current_file$action = SMB::FILE_CLOSE;
|
||||
break;
|
||||
case "PIPE":
|
||||
c$smb_state$current_file$action = SMB::PIPE_CLOSE;
|
||||
break;
|
||||
case "PRINT":
|
||||
c$smb_state$current_file$action = SMB::PRINT_CLOSE;
|
||||
break;
|
||||
default:
|
||||
c$smb_state$current_file$action = SMB::FILE_CLOSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
event smb2_close_request(c: connection, hdr: SMB2::Header, file_id: SMB2::GUID) &priority=-5
|
||||
{
|
||||
if ( file_id$persistent+file_id$volatile in c$smb_state$fid_map )
|
||||
{
|
||||
local fl = c$smb_state$fid_map[file_id$persistent+file_id$volatile];
|
||||
# Need to check for existence of path in case tree connect message wasn't seen.
|
||||
if ( c$smb_state$current_tree?$path )
|
||||
fl$path = c$smb_state$current_tree$path;
|
||||
delete c$smb_state$fid_map[file_id$persistent+file_id$volatile];
|
||||
|
||||
SMB::write_file_log(c$smb_state);
|
||||
}
|
||||
else
|
||||
{
|
||||
# TODO - Determine correct action
|
||||
# A reporter message is not right...
|
||||
#Reporter::warning("attempting to close an unknown file!");
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue